EventLogEntryType Enum

Definition

Namespace:

System.Diagnostics

Assembly:

System.Diagnostics.EventLog.dll

Specifies the event type of an event log entry.

public enum class EventLogEntryType

public enum EventLogEntryType

type EventLogEntryType = 

Public Enum EventLogEntryType

Inheritance

Object

ValueType

Enum

EventLogEntryType

Fields

Name	Value	Description
Error	1	An error event. This indicates a significant problem the user should know about; usually a loss of functionality or data.
Warning	2	A warning event. This indicates a problem that is not immediately significant, but that may signify conditions that could cause future problems.
Information	4	An information event. This indicates a significant, successful operation.
SuccessAudit	8	A success audit event. This indicates a security event that occurs when an audited access attempt is successful; for example, logging on successfully.
FailureAudit	16	A failure audit event. This indicates a security event that occurs when an audited access attempt fails; for example, a failed attempt to open a file.

Examples

The following code example demonstrates how to use the EventLogEntryType class to add information about triggered events to a log file. In this example, a switch statement is used to determine the event type. Each case statement uses the EventLogEntryType to specify the event type, gets the message and ID, and then writes the information to the log.

// Check whether source exist in event log.
if (  !EventLog::SourceExists( mySource ) )
{
   
   // Create a new source in a specified log on a system.
   EventLog::CreateEventSource( mySource, myLog );
}

// Create an event log instance.* myEventLog = new EventLog(myLog);
// Initialize source property of obtained instance.
myEventLog->Source = mySource;
switch ( myIntLog )
{
   case 1:
      
      // Write an 'Error' entry in specified log of event log.
      myEventLog->WriteEntry( myMessage, EventLogEntryType::Error, myID );
      break;

   case 2:
      
      // Write a 'Warning' entry in specified log of event log.
      myEventLog->WriteEntry( myMessage, EventLogEntryType::Warning, myID );
      break;

   case 3:
      
      // Write an 'Information' entry in specified log of event log.
      myEventLog->WriteEntry( myMessage, EventLogEntryType::Information, myID );
      break;

   case 4:
      
      // Write a 'FailureAudit' entry in specified log of event log.
      myEventLog->WriteEntry( myMessage, EventLogEntryType::FailureAudit, myID );
      break;

   case 5:
      
      // Write a 'SuccessAudit' entry in specified log of event log.
      myEventLog->WriteEntry( myMessage, EventLogEntryType::SuccessAudit, myID );
      break;

   default:
      Console::WriteLine( "Error: Failed to create an event in event log." );
      break;
}
Console::WriteLine( "A new event in log '{0}' with ID '{1}' is successfully written into event log.", myEventLog->Log, myID );

// Create an event log instance.
myEventLog = new EventLog(myLog);
// Initialize source property of obtained instance.
myEventLog.Source = mySource;
switch (myIntLog)
{
    case 1:
        // Write an 'Error' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Error, myID);
        break;
    case 2:
        // Write a 'Warning' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Warning, myID);
        break;
    case 3:
        // Write an 'Information' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Information, myID);
        break;
    case 4:
        // Write a 'FailureAudit' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.FailureAudit, myID);
        break;
    case 5:
        // Write a 'SuccessAudit' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.SuccessAudit, myID);
        break;
    default:
        Console.WriteLine("Error: Failed to create an event in event log.");
        break;
}
Console.WriteLine("A new event in log '{0}' with ID '{1}' "
   + "is successfully written into event log.",
   myEventLog.Log, myID);

' Check whether source exist in event log.
If False = EventLog.SourceExists(mySource) Then
   ' Create a new source in a specified log on a system.
   EventLog.CreateEventSource(mySource, myLog)
End If
' Create an event log instance.
myEventLog = New EventLog(myLog)
' Initialize source property of obtained instance.
myEventLog.Source = mySource
Select Case myIntLog
   Case 1
      ' Write an 'Error' entry in specified log of event log.
      myEventLog.WriteEntry(myMessage, EventLogEntryType.Error, myID)
   Case 2
      ' Write a 'Warning' entry in specified log of event log.
      myEventLog.WriteEntry(myMessage, EventLogEntryType.Warning, myID)
   Case 3
      ' Write an 'Information' entry in specified log of event log.
      myEventLog.WriteEntry(myMessage, EventLogEntryType.Information, myID)
   Case 4
      ' Write a 'FailureAudit' entry in specified log of event log.
      myEventLog.WriteEntry(myMessage, EventLogEntryType.FailureAudit, myID)
   Case 5
      ' Write a 'SuccessAudit' entry in specified log of event log.
      myEventLog.WriteEntry(myMessage, EventLogEntryType.SuccessAudit, myID)
   Case Else
      Console.WriteLine("Error: Failed to create an event in event log.")
End Select
Console.WriteLine("A new event in log '{0}' with ID '{1}' " + _
         "is successfully written into event log.", myEventLog.Log, myID)

Remarks

The type of an event log entry provides additional information for the entry. Applications set the entry type when they write the entry to the event log.

Each event must be of a single type; the event types cannot be combined for an entry. The Event Viewer uses this type to determine which icon to display in the list view of the log.

See also

• EventLogEntry